error when trying the run netmessclient

[Nobody/Anonymous]

hi
i get the error when i try and run the netmessclient im using mandrake 9  this is the error i get.

[nexe@nexe netmess-0.99]$ ./NetMessClient
(8177|1024) Starting up NetMess node v0.99.4-linux-x86 (Jul  4 2002 22:33:41)
(8177|1024) Please wait....
Class path: NetMessClient.jar:.:/usr/lib/kaffe/lib/rt.jar:/usr/lib/kaffe/lib/comm.jar:/usr/lib/kaffe/lib/pjava.jar:/usr/lib/kaffe/lib/servlet.jar:/usr/lib/kaffe/lib/tools.jar:/usr/lib/kaffe/lib/microsoft.jar:/usr/lib/kaffe/lib/kjc.jar:/usr/lib/kaffe/lib/rmi.jar:NetMessClient.jar
Caught Exception: -1

Program dir is: /home/nexe/downloads/netmess-0.99
User dir is: /home/nexe
java.lang.reflect.InvocationTargetException: java.lang.ClassNotFoundException: javax.swing.UIManager
        at java.lang.reflect.Method.invoke0(Method.java:native)
        at java.lang.reflect.Method.invoke(Method.java:256)
        at nmclauncher.JarClassLoader.invokeClass(JarClassLoader.java:66)
        at nmclauncher.NmcApp.main(NmcApp.java:93)
        at java.lang.reflect.Method.invoke0(Method.java:native)
        at java.lang.reflect.Method.invoke(Method.java:256)
        at kaffe.jar.ExecJarName.main(ExecJarName.java:66)
        at kaffe.jar.ExecJar.main(ExecJar.java:71)
[nexe@nexe netmess-0.99]$

[Ali Bousahid]

What version of the java run time do you use, seems it's a little bit outdated

[Nobody/Anonymous]

ahh cool i hope that is the problem thx